\section{Neural networks}
	
	\paragraph{Artificial neural networks\\}
	
		Capture a few properties of the real nervous system. Have many interesting computational properties :
		\begin{itemize}
			\item Distributed representations
			\item Concepts / symbols are emergent
			\item Powerful learning and generalization
			\item Robust and noise tolerant
			\item No (obvious) search
		\end{itemize}
		
		There are also psychological neuron models :
		\begin{itemize}
			\item For example the Hodgkin-Huxley model
			\item Less efficient from a computational perspective
			\item More interesting from a physiological perspective
		\end{itemize}
		
		\paragraph*{Biological Neurons}